fixed film bioreactor
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2020 ◽  
Vol 8 ◽  
Author(s):  
Suniti Singh ◽  
B. Conall Holohan ◽  
Simon Mills ◽  
Juan Castilla-Archilla ◽  
Marika Kokko ◽  
...  

2018 ◽  
Vol 6 (5) ◽  
pp. 6154-6164 ◽  
Author(s):  
Sanaz Pahlavanzadeh ◽  
Khaled Zoroufchi Benis ◽  
Mohammad Shakerkhatibi ◽  
Ayoub Karimi Jashni ◽  
Nasser Taleb Beydokhti ◽  
...  

2016 ◽  
Vol 73 (10) ◽  
pp. 2461-2467 ◽  
Author(s):  
E. Rava ◽  
E. Chirwa

The purpose of this study was to determine the effect different biofilm carrier filling ratios would have on biofilm morphology and activity and bacterial diversity in a hybrid fixed-film bioreactor treating high strength coal gasification wastewater (CGWW) for the removal of chemical oxygen demand (COD), phenols and ammonia-nitrogen. Results showed that a carrier fill of 70% formed a ‘compact’ biofilm, a 50% fill formed a ‘rippling’ biofilm and a 30% fill formed a ‘porous’ biofilm. The highest microbial activity was obtained with a 50% carrier fill supporting a relatively thin biofilm. The highest level of biofilm bound metals were aluminium, silicon, calcium and iron in the ‘compact’ biofilm; nitrogen, magnesium, chloride, sodium and potassium in the ‘rippling’ biofilm, and copper in the ‘porous’ biofilm. The bioreactor improved the quality of the CGWW by removing 49% and 78% of the COD and phenols, respectively. However, no significant amount of ammonia-nitrogen was removed since nitrification did not take place due to heterotrophic bacteria out-competing autotrophic nitrifying bacteria in the biofilm. The dominant heterotrophic genera identified for all three carrier filling ratios were Thauera, Pseudaminobacter, Pseudomonas and Diaphorobacter.


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